Installing Flash player with Inno and restarting computer

Hi, my application uses the Shockwave Flash control, so I need to add it to my installation package.

I downloaded the 1.87 MB "install_flash_player_ax.exe" file from http://get.adobe.com/flashplayer/

When I install the Flash player manually by double-clicking on the executable, it installs the player and the computer doesn't have to be restarted. But when I add it to my Inno installation package, Inno always says that the computer needs to be restarted when installation has finished. Why?

Code:

---

[Files]
Source: "install_flash_player_ax.exe"; DestDir: "{app}"; Flags: deleteafterinstall;

[Run]
Filename: {app}\install_flash_player_ax.exe; Parameters: /S; StatusMsg: Installing or updating Adobe Flash Player. Please wait...; Flags: runhidden

---